This photo is one of my first. Being relatively new to U/W photography, any feedback is appreciated.

The camera settings are below. The only post processing I performed was some croping and adjusting of the curves in PhotoShop to lighten the photo up a bit.
Camera Model Name: Canon PowerShot G2
Housing: Ikelite
Flash: SB 105 (Single)
Shooting Mode: Manual
Tv( Shutter Speed ): 1/60
Av( Aperture Value ): 6.3
Metering Mode: Evaluative
Exposure Compensation: 0
ISO Speed: 50
Lens: 7.0 - 21.0mm
Focal Length: 21.0mm
Shutter curtain sync: 1st-curtain sync
White Balance: Auto